EP0451473A1 - Procédé et dispositif pour l'introduction d'agents pulvérulents dans une poche de coulée - Google Patents

Procédé et dispositif pour l'introduction d'agents pulvérulents dans une poche de coulée Download PDF

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Publication number
EP0451473A1
EP0451473A1 EP91102708A EP91102708A EP0451473A1 EP 0451473 A1 EP0451473 A1 EP 0451473A1 EP 91102708 A EP91102708 A EP 91102708A EP 91102708 A EP91102708 A EP 91102708A EP 0451473 A1 EP0451473 A1 EP 0451473A1
Authority
EP
European Patent Office
Prior art keywords
melt
reagents
lance
axis
melting pan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP91102708A
Other languages
German (de)
English (en)
Inventor
Alfons Oskamp
Frank Dr.-Ing. Schaberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0451473A1 publication Critical patent/EP0451473A1/fr
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0026—Introducing additives into the melt

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 8 for introducing powdered reagents into a melting pan.
  • a method according to the preamble of claim 1 and a device according to the preamble of claim 8 are already known from EP-A 0 342 395.
  • the powdered reagents are introduced into a melting pan via a lance using a transport gas.
  • the lance is arranged eccentrically to the pan axis, and its outlet nozzles are directed into the larger region of the pan enclosing the pan axis.
  • a flow is established through the transport gas and the reagents used, so that a good mixing of the added reagents is achieved.
  • a high amount of transport gas causes a high rate of buoyancy of the reagents. This undesirably shortens the residence time in which the reagents can mix with the melt. On the other hand, a small amount of transport gas also causes poor mixing of the reagents into the melt, since the movement of the molten bath is not sufficient to distribute the reagents well.
  • the invention is therefore based on the object of improving the method according to the preamble of claim 1 in such a way that the mixing of the reagents into the melt is homogenized and at the same time the amount of transport gas is reduced.
  • a melting pan 1 filled with a melt 3, for example made of pig iron or steel.
  • a lance 2 arranged eccentrically to the melting pan axis 1 a is introduced into the melt 3.
  • At least one outlet opening 2a is provided at the melt end of the lance 2.
  • the lance 2 is offset 0.2 to 0.8 times, preferably 0.4 to 0.6 times the melting pan radius R with respect to the melting pan axis 1a.
  • a slightly oblique insertion is also possible within the scope of the invention.
  • the lance 2 can also be rotated about its axis 2b in an angular range of 180 ° via a drive (not shown).
  • the outlet opening 2a should be aligned with the melting pan axis 1a. If several outlet openings are provided in the lower region of the lance 2, these openings are to be arranged symmetrically to the plane formed from the melting ladle axis 1a and the axis 2b when the lance is in the position in the middle of the angular range.
  • the lance 2 is connected to a delivery line (not shown) and is drawn into the melt 3 with a device (also not shown). Before the lower end of the lance 2 enters the melt 3, but at the latest after reaching the The lowest position of the lance in the melt activates the drive, not shown, whereby the lance rotates back and forth in its predetermined angular range.
  • the powdery reagents are brought together with a transport gas via the delivery line and blown into the melt 3 through the outlet opening 2a of the lance 2.
  • the lance swivels or rotates to one end of the predetermined angular range and turns back in the opposite direction after an adjustable holding time.
  • the holding time depends on many factors, such as the size and shape of the melting pan and the design of the lance. It can be set continuously, for example between 0 and 60 seconds, depending on the individual application.
  • the speed of the rotating movement of the lance can also be adjusted; it is preferably between 0.1 and 5 rotary movements per second.
  • the speed of rotation and the holding time can be set in such a way that an optimal melt bath movement results, as a result of which the powdered reagents added can be mixed in optimally.
  • the outlet nozzle is directed by the rotating movement of the lance 2 into the larger region of the melting pan 1 facing away from the lance and away from the peripheral wall 1b of the melting pan 1, including the melting pan axis 1a, so that the rinsing mark identified by surface 4 results.
  • the outlet opening sweeps over the opposite region in the direction of the peripheral wall 1b near the lance with the rotary movement of the lance 2.
  • the powdered reagents carried with the transport gas 6 can be optimally mixed with the melt.
  • the stopping times at the turning points of the rotary movement of the lance 2 can additionally set the melt in motion, in particular the melt located at the edge of the melting pan 1, as a result of which the mixing of the reagents is further improved.
  • the optimal movement of the melt makes it possible to minimize the amount of transport gas. With a smaller amount of transport gas, the powdered reagents carried have more time to mix with the melt. However, this presupposes that the melt is set in sufficient motion, which is ensured by the rotating lance.
  • the rotation of the lance ends either when the sufficient amount of powdered reagents has been blown into the melt 3 or when the lance 2 moves out of the melt 3 or when the lance has reached its uppermost position outside the melt after the blowing process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP91102708A 1990-03-08 1991-02-25 Procédé et dispositif pour l'introduction d'agents pulvérulents dans une poche de coulée Ceased EP0451473A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904007390 DE4007390A1 (de) 1990-03-08 1990-03-08 Verfahren und vorrichtung zum einbringen von pulverfoermigen reagenzien in eine schmelzpfanne
DE4007390 1990-03-08

Publications (1)

Publication Number Publication Date
EP0451473A1 true EP0451473A1 (fr) 1991-10-16

Family

ID=6401741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102708A Ceased EP0451473A1 (fr) 1990-03-08 1991-02-25 Procédé et dispositif pour l'introduction d'agents pulvérulents dans une poche de coulée

Country Status (2)

Country Link
EP (1) EP0451473A1 (fr)
DE (1) DE4007390A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2215275A2 (fr) * 2007-09-05 2010-08-11 Specialty Minerals (Michigan) Inc. Lance rotative
CN111961889A (zh) * 2020-09-07 2020-11-20 江苏汇联铝业有限公司 一种熔炼合金过程中粉状料的加入设备及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796138B1 (fr) * 1999-07-07 2001-09-21 Kvaerner Metals Clecim Procede de fusion d'une matiere metallique et installation pour la mise en oeuvre du procede

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926241A1 (de) * 1969-05-22 1970-11-26 Weisse Dr Ernst Vorrichtung zum Zufuehren von Behandlungsgasen in Metallschmelzen
DE2225810A1 (de) * 1972-05-26 1973-12-06 Polysius Ag Tauchlanze zum einfuehren von reaktionsstoffen in ein bad
EP0274557A1 (fr) * 1986-12-12 1988-07-20 Krupp Polysius Ag Dispositif pour introduire des réactifs pulvérulents dans une poche de fusion
EP0342395A1 (fr) * 1988-05-20 1989-11-23 Krupp Polysius Ag Dispositif pour introduire des réactifs pulvérulents dans une poche de fusion

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1064969B (de) * 1954-05-26 1959-09-10 Hoerder Huettenunion Ag Verfahren und Vorrichtung zum Oberwindfrischen von phosphorhaltigem Roheisen
AT224673B (de) * 1960-03-31 1962-12-10 Hoesch Ag Vorrichtung zum Einbringen von feinkörnigen Zusatzstoffen in Metallschmelzen
US3212882A (en) * 1962-03-14 1965-10-19 Garfinkle Marvin Method and apparatus for oxygen steelmaking
US4094667A (en) * 1977-01-31 1978-06-13 Dravo Corporation Melting of fine particulate material in a high-speed rotary furnace
US4341554A (en) * 1981-04-02 1982-07-27 Jones & Laughlin Steel Incorporated Process for desulfurizing steel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926241A1 (de) * 1969-05-22 1970-11-26 Weisse Dr Ernst Vorrichtung zum Zufuehren von Behandlungsgasen in Metallschmelzen
DE2225810A1 (de) * 1972-05-26 1973-12-06 Polysius Ag Tauchlanze zum einfuehren von reaktionsstoffen in ein bad
EP0274557A1 (fr) * 1986-12-12 1988-07-20 Krupp Polysius Ag Dispositif pour introduire des réactifs pulvérulents dans une poche de fusion
EP0342395A1 (fr) * 1988-05-20 1989-11-23 Krupp Polysius Ag Dispositif pour introduire des réactifs pulvérulents dans une poche de fusion

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 11, Nr. 150 (C-422)[2597], 15. Mai 1987; & JP-A-61 284 511 (KAWASAKI) 15-12-1986 *
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 278 (C-312)[2001], 6. November 1985; & JP-A-60 125 314 (NIPPON KOKAN) 04-07-1985 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2215275A2 (fr) * 2007-09-05 2010-08-11 Specialty Minerals (Michigan) Inc. Lance rotative
EP2215275A4 (fr) * 2007-09-05 2014-03-19 Specialty Minerals Michigan Lance rotative
CN111961889A (zh) * 2020-09-07 2020-11-20 江苏汇联铝业有限公司 一种熔炼合金过程中粉状料的加入设备及方法
CN111961889B (zh) * 2020-09-07 2021-02-09 江苏汇联铝业有限公司 一种熔炼合金过程中粉状料的加入设备及方法

Also Published As

Publication number Publication date
DE4007390A1 (de) 1991-09-12

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